From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Kitchin <jkitchin@andrew.cmu.edu>
Subject: Re: Sverweis like function for orgtbl
Date: Mon, 16 Feb 2015 13:58:38 -0500
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To: Thorsten Grothe <info@th-grothe.de>
Cc: emacs-orgmode@gnu.org

Here is one way to do it in a code block.

#+tblname: tab-data
| Menge (x) | P(x) |   E(x) |   K(x) |  Gewinn |
|-----------+------+--------+--------+---------|
|         0 |   20 | 0.00   | 140.00 | -140.00 |
|        10 |   18 | 180.00 | 180.00 | 0.00    |
|        20 |   16 | 320.00 | 220.00 | 100.00  |
|        30 |   14 | 420.00 | 260.00 | 160.00  |


#+BEGIN_SRC emacs-lisp :var data=tab-data :results code
(let ((c4 (mapcar (lambda (x) (nth 4 x)) data))
      (c2 (mapcar (lambda (x) (nth 2 x)) data)))
   (nth (-elem-index (-max c4) c4) c2))
#+END_SRC

#+RESULTS:
#+BEGIN_SRC emacs-lisp
420.0
#+END_SRC

If you put the cursor on -140, and run this code, it does sort of the
same thing.

#+BEGIN_SRC emacs-lisp
(defun jt ()
 "find max in column, message the corresponding value in column 3."
 (interactive)
 (let ((max (string-to-number (org-table-get-field)))
       (row (org-table-current-line)))
   (while (org-table-next-row)
     (when (>  (string-to-number (org-table-get-field)) max)
       (setq max (string-to-number (org-table-get-field))
             ind (org-table-current-line))))
   (org-table-goto-line ind)
   ; columns start at 1?
   (org-table-goto-column 3)
   (message-box "%s" (org-table-get-field))))
#+END_SRC

Thorsten Grothe writes:

> Dear Org-users,
>
> I got this table:
>
> | Menge (x) | P(x) |   E(x) |   K(x) |  Gewinn |
> |-----------+------+--------+--------+---------|
> |         0 |   20 | 0.00   | 140.00 | -140.00 |
> |        10 |   18 | 180.00 | 180.00 | 0.00    |
> |        20 |   16 | 320.00 | 220.00 | 100.00  |
> |        30 |   14 | 420.00 | 260.00 | 160.00  |
>
> and would like to find the highest value in the column "Gewinn" = 160 go
> two cells left to E(x), read out the value (420) and put this in a remote
> orgtbl. This is something similar to Sverweis in Excel.
>
> I found no predefined function for orgtbl, is it possible?
>
> Thanks in advance!
>
> Regards
> Thorsten

--
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
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@johnkitchin
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